[PATCH] D113946: [libc][clang-tidy] fix namespace check for externals

2021-11-30 Thread Michael Jones via Phabricator via cfe-commits 
This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rG155f5a6dac62: [libc][clang-tidy] fix namespace check for 
externals (authored by michaelrj).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D113946/new/

https://reviews.llvm.org/D113946

Files:
  clang-tools-extra/clang-tidy/llvmlibc/CalleeNamespaceCheck.cpp
  clang-tools-extra/test/clang-tidy/checkers/llvmlibc-callee-namespace.cpp
  libc/docs/clang_tidy_checks.rst
  libc/src/__support/FPUtil/NearestIntegerOperations.h
  libc/src/__support/str_to_float.h
  libc/src/__support/str_to_integer.h
  libc/src/math/generic/math_utils.h
  libc/src/string/strdup.cpp
  libc/src/string/strndup.cpp

Index: libc/src/string/strndup.cpp
===
--- libc/src/string/strndup.cpp
+++ libc/src/string/strndup.cpp
@@ -23,7 +23,7 @@
   size_t len = internal::string_length(src);
   if (len > size)
 len = size;
-  char *dest = reinterpret_cast(::malloc(len + 1)); // NOLINT
+  char *dest = reinterpret_cast(::malloc(len + 1));
   if (dest == nullptr)
 return nullptr;
   inline_memcpy(dest, src, len + 1);
Index: libc/src/string/strdup.cpp
===
--- libc/src/string/strdup.cpp
+++ libc/src/string/strdup.cpp
@@ -21,7 +21,7 @@
 return nullptr;
   }
   size_t len = internal::string_length(src) + 1;
-  char *dest = reinterpret_cast(::malloc(len)); // NOLINT
+  char *dest = reinterpret_cast(::malloc(len));
   if (dest == nullptr) {
 return nullptr;
   }
Index: libc/src/math/generic/math_utils.h
===
--- libc/src/math/generic/math_utils.h
+++ libc/src/math/generic/math_utils.h
@@ -55,7 +55,7 @@
 
 template  static inline T with_errno(T x, int err) {
   if (math_errhandling & MATH_ERRNO)
-errno = err; // NOLINT
+errno = err;
   return x;
 }
 
Index: libc/src/__support/str_to_integer.h
===
--- libc/src/__support/str_to_integer.h
+++ libc/src/__support/str_to_integer.h
@@ -74,7 +74,7 @@
   const char *original_src = src;
 
   if (base < 0 || base == 1 || base > 36) {
-errno = EINVAL; // NOLINT
+errno = EINVAL;
 return 0;
   }
 
@@ -114,19 +114,19 @@
 // the result cannot change, but we still need to advance src to the end of
 // the number.
 if (result == ABS_MAX) {
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
   continue;
 }
 
 if (result > ABS_MAX_DIV_BY_BASE) {
   result = ABS_MAX;
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
 } else {
   result = result * base;
 }
 if (result > ABS_MAX - cur_digit) {
   result = ABS_MAX;
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
 } else {
   result = result + cur_digit;
 }
Index: libc/src/__support/str_to_float.h
===
--- libc/src/__support/str_to_float.h
+++ libc/src/__support/str_to_float.h
@@ -200,7 +200,7 @@
   static_cast(fputil::FloatProperties::exponentBias)) {
 *outputMantissa = 0;
 *outputExp2 = fputil::FPBits::maxExponent;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
   // If the exponent is too small even for a subnormal, return 0.
@@ -210,7 +210,7 @@
fputil::FloatProperties::mantissaWidth)) {
 *outputMantissa = 0;
 *outputExp2 = 0;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
 
@@ -253,7 +253,7 @@
   if (exp2 >= fputil::FPBits::maxExponent) {
 *outputMantissa = 0;
 *outputExp2 = fputil::FPBits::maxExponent;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
 
@@ -289,7 +289,7 @@
   }
 
   if (exp2 == 0) {
-errno = ERANGE; // NOLINT
+errno = ERANGE;
   }
 
   *outputMantissa = finalMantissa;
@@ -391,7 +391,7 @@
   static_cast(fputil::FloatProperties::exponentBias) / 3) {
 *outputMantissa = 0;
 *outputExp2 = fputil::FPBits::maxExponent;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
   // If the exponent is too small even for a subnormal, return 0.
@@ -402,7 +402,7 @@
   2) {
 *outputMantissa = 0;
 *outputExp2 = 0;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
 
@@ -467,7 +467,7 @@
 // This indicates an overflow, so we make the result INF and set errno.
 *outputExp2 = (1 << fputil::FloatProperties::exponentWidth) - 1;
 *outputMantissa = 0;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
 
@@ -483,7 +483,7 @@
   // Return 0 if the exponent is too small.
   *outputMantissa = 0;
   *outputExp2 = 0;
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
   return;
 }
   }
@@ -511,12 +511,12 @@

[PATCH] D113946: [libc][clang-tidy] fix namespace check for externals

2021-11-30 Thread Michael Jones via Phabricator via cfe-commits 
michaelrj updated this revision to Diff 390769.
michaelrj added a comment.

fix final comments before commit


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
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https://reviews.llvm.org/D113946

Files:
  clang-tools-extra/clang-tidy/llvmlibc/CalleeNamespaceCheck.cpp
  clang-tools-extra/test/clang-tidy/checkers/llvmlibc-callee-namespace.cpp
  libc/docs/clang_tidy_checks.rst
  libc/src/__support/FPUtil/NearestIntegerOperations.h
  libc/src/__support/str_to_float.h
  libc/src/__support/str_to_integer.h
  libc/src/math/generic/math_utils.h
  libc/src/string/strdup.cpp
  libc/src/string/strndup.cpp

Index: libc/src/string/strndup.cpp
===
--- libc/src/string/strndup.cpp
+++ libc/src/string/strndup.cpp
@@ -23,7 +23,7 @@
   size_t len = internal::string_length(src);
   if (len > size)
 len = size;
-  char *dest = reinterpret_cast(::malloc(len + 1)); // NOLINT
+  char *dest = reinterpret_cast(::malloc(len + 1));
   if (dest == nullptr)
 return nullptr;
   inline_memcpy(dest, src, len + 1);
Index: libc/src/string/strdup.cpp
===
--- libc/src/string/strdup.cpp
+++ libc/src/string/strdup.cpp
@@ -21,7 +21,7 @@
 return nullptr;
   }
   size_t len = internal::string_length(src) + 1;
-  char *dest = reinterpret_cast(::malloc(len)); // NOLINT
+  char *dest = reinterpret_cast(::malloc(len));
   if (dest == nullptr) {
 return nullptr;
   }
Index: libc/src/math/generic/math_utils.h
===
--- libc/src/math/generic/math_utils.h
+++ libc/src/math/generic/math_utils.h
@@ -55,7 +55,7 @@
 
 template  static inline T with_errno(T x, int err) {
   if (math_errhandling & MATH_ERRNO)
-errno = err; // NOLINT
+errno = err;
   return x;
 }
 
Index: libc/src/__support/str_to_integer.h
===
--- libc/src/__support/str_to_integer.h
+++ libc/src/__support/str_to_integer.h
@@ -74,7 +74,7 @@
   const char *original_src = src;
 
   if (base < 0 || base == 1 || base > 36) {
-errno = EINVAL; // NOLINT
+errno = EINVAL;
 return 0;
   }
 
@@ -114,19 +114,19 @@
 // the result cannot change, but we still need to advance src to the end of
 // the number.
 if (result == ABS_MAX) {
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
   continue;
 }
 
 if (result > ABS_MAX_DIV_BY_BASE) {
   result = ABS_MAX;
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
 } else {
   result = result * base;
 }
 if (result > ABS_MAX - cur_digit) {
   result = ABS_MAX;
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
 } else {
   result = result + cur_digit;
 }
Index: libc/src/__support/str_to_float.h
===
--- libc/src/__support/str_to_float.h
+++ libc/src/__support/str_to_float.h
@@ -200,7 +200,7 @@
   static_cast(fputil::FloatProperties::exponentBias)) {
 *outputMantissa = 0;
 *outputExp2 = fputil::FPBits::maxExponent;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
   // If the exponent is too small even for a subnormal, return 0.
@@ -210,7 +210,7 @@
fputil::FloatProperties::mantissaWidth)) {
 *outputMantissa = 0;
 *outputExp2 = 0;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
 
@@ -253,7 +253,7 @@
   if (exp2 >= fputil::FPBits::maxExponent) {
 *outputMantissa = 0;
 *outputExp2 = fputil::FPBits::maxExponent;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
 
@@ -289,7 +289,7 @@
   }
 
   if (exp2 == 0) {
-errno = ERANGE; // NOLINT
+errno = ERANGE;
   }
 
   *outputMantissa = finalMantissa;
@@ -391,7 +391,7 @@
   static_cast(fputil::FloatProperties::exponentBias) / 3) {
 *outputMantissa = 0;
 *outputExp2 = fputil::FPBits::maxExponent;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
   // If the exponent is too small even for a subnormal, return 0.
@@ -402,7 +402,7 @@
   2) {
 *outputMantissa = 0;
 *outputExp2 = 0;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
 
@@ -467,7 +467,7 @@
 // This indicates an overflow, so we make the result INF and set errno.
 *outputExp2 = (1 << fputil::FloatProperties::exponentWidth) - 1;
 *outputMantissa = 0;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
 
@@ -483,7 +483,7 @@
   // Return 0 if the exponent is too small.
   *outputMantissa = 0;
   *outputExp2 = 0;
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
   return;
 }
   }
@@ -511,12 +511,12 @@
 ++biasedExponent;
 
 if (biasedExponent == INF_EXP) {
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
 }
   }
 
   if

[PATCH] D113946: [libc][clang-tidy] fix namespace check for externals

2021-11-30 Thread Aaron Ballman via Phabricator via cfe-commits 
aaron.ballman accepted this revision.
aaron.ballman added a comment.

LGTM aside from a tiny nit with the documentation.




Comment at: libc/docs/clang_tidy_checks.rst:71
+There are exceptions for the following functions: 
+``__errno_location`` so that errno can be set
+``malloc``, ``calloc``, ``realloc``, and ``free`` since they are always 
external




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[PATCH] D113946: [libc][clang-tidy] fix namespace check for externals

2021-11-19 Thread Michael Jones via Phabricator via cfe-commits 
michaelrj updated this revision to Diff 388588.
michaelrj marked 3 inline comments as done.
michaelrj added a comment.

address comments and rebase


Repository:
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Files:
  clang-tools-extra/clang-tidy/llvmlibc/CalleeNamespaceCheck.cpp
  clang-tools-extra/test/clang-tidy/checkers/llvmlibc-callee-namespace.cpp
  libc/docs/clang_tidy_checks.rst
  libc/src/__support/FPUtil/NearestIntegerOperations.h
  libc/src/__support/str_to_float.h
  libc/src/__support/str_to_integer.h
  libc/src/math/generic/math_utils.h
  libc/src/string/strdup.cpp
  libc/src/string/strndup.cpp

Index: libc/src/string/strndup.cpp
===
--- libc/src/string/strndup.cpp
+++ libc/src/string/strndup.cpp
@@ -23,7 +23,7 @@
   size_t len = internal::string_length(src);
   if (len > size)
 len = size;
-  char *dest = reinterpret_cast(::malloc(len + 1)); // NOLINT
+  char *dest = reinterpret_cast(::malloc(len + 1));
   if (dest == nullptr)
 return nullptr;
   char *result =
Index: libc/src/string/strdup.cpp
===
--- libc/src/string/strdup.cpp
+++ libc/src/string/strdup.cpp
@@ -21,7 +21,7 @@
 return nullptr;
   }
   size_t len = internal::string_length(src) + 1;
-  char *dest = reinterpret_cast(::malloc(len)); // NOLINT
+  char *dest = reinterpret_cast(::malloc(len));
   if (dest == nullptr) {
 return nullptr;
   }
Index: libc/src/math/generic/math_utils.h
===
--- libc/src/math/generic/math_utils.h
+++ libc/src/math/generic/math_utils.h
@@ -55,7 +55,7 @@
 
 template  static inline T with_errno(T x, int err) {
   if (math_errhandling & MATH_ERRNO)
-errno = err; // NOLINT
+errno = err;
   return x;
 }
 
Index: libc/src/__support/str_to_integer.h
===
--- libc/src/__support/str_to_integer.h
+++ libc/src/__support/str_to_integer.h
@@ -74,7 +74,7 @@
   const char *original_src = src;
 
   if (base < 0 || base == 1 || base > 36) {
-errno = EINVAL; // NOLINT
+errno = EINVAL;
 return 0;
   }
 
@@ -114,19 +114,19 @@
 // the result cannot change, but we still need to advance src to the end of
 // the number.
 if (result == ABS_MAX) {
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
   continue;
 }
 
 if (result > ABS_MAX_DIV_BY_BASE) {
   result = ABS_MAX;
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
 } else {
   result = result * base;
 }
 if (result > ABS_MAX - cur_digit) {
   result = ABS_MAX;
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
 } else {
   result = result + cur_digit;
 }
Index: libc/src/__support/str_to_float.h
===
--- libc/src/__support/str_to_float.h
+++ libc/src/__support/str_to_float.h
@@ -200,7 +200,7 @@
   static_cast(fputil::FloatProperties::exponentBias)) {
 *outputMantissa = 0;
 *outputExp2 = fputil::FPBits::maxExponent;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
   // If the exponent is too small even for a subnormal, return 0.
@@ -210,7 +210,7 @@
fputil::FloatProperties::mantissaWidth)) {
 *outputMantissa = 0;
 *outputExp2 = 0;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
 
@@ -253,7 +253,7 @@
   if (exp2 >= fputil::FPBits::maxExponent) {
 *outputMantissa = 0;
 *outputExp2 = fputil::FPBits::maxExponent;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
 
@@ -289,7 +289,7 @@
   }
 
   if (exp2 == 0) {
-errno = ERANGE; // NOLINT
+errno = ERANGE;
   }
 
   *outputMantissa = finalMantissa;
@@ -391,7 +391,7 @@
   static_cast(fputil::FloatProperties::exponentBias) / 3) {
 *outputMantissa = 0;
 *outputExp2 = fputil::FPBits::maxExponent;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
   // If the exponent is too small even for a subnormal, return 0.
@@ -402,7 +402,7 @@
   2) {
 *outputMantissa = 0;
 *outputExp2 = 0;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
 
@@ -467,7 +467,7 @@
 // This indicates an overflow, so we make the result INF and set errno.
 *outputExp2 = (1 << fputil::FloatProperties::exponentWidth) - 1;
 *outputMantissa = 0;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
 
@@ -483,7 +483,7 @@
   // Return 0 if the exponent is too small.
   *outputMantissa = 0;
   *outputExp2 = 0;
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
   return;
 }
   }
@@ -511,12 +511,12 @@
 ++biasedExponent;
 
 if (biasedExponent == INF_EXP) {
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;

[PATCH] D113946: [libc][clang-tidy] fix namespace check for externals

2021-11-18 Thread Aaron Ballman via Phabricator via cfe-commits 
aaron.ballman added inline comments.



Comment at: clang-tools-extra/clang-tidy/llvmlibc/CalleeNamespaceCheck.cpp:39
+// intercepted.
+static const llvm::StringSet<> FUNCTIONS_TO_IGNORE_NAMESPACE = {
+"__errno_location", "malloc", "calloc", "realloc", "free"};

This is more in line with the coding style guidelines.



Comment at: clang-tools-extra/clang-tidy/llvmlibc/CalleeNamespaceCheck.cpp:40
+static const llvm::StringSet<> FUNCTIONS_TO_IGNORE_NAMESPACE = {
+"__errno_location", "malloc", "calloc", "realloc", "free"};
+

Is there a reason that `aligned_alloc` function is excluded?



Comment at: clang-tools-extra/clang-tidy/llvmlibc/CalleeNamespaceCheck.cpp:55-57
+  if (FUNCTIONS_TO_IGNORE_NAMESPACE.contains(FuncDecl->getName())) {
+return;
+  }

Style guideline nits.


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[PATCH] D113946: [libc][clang-tidy] fix namespace check for externals

2021-11-18 Thread Michael Jones via Phabricator via cfe-commits 
michaelrj added a comment.

ping for clang-tidy review


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[PATCH] D113946: [libc][clang-tidy] fix namespace check for externals

2021-11-17 Thread Michael Jones via Phabricator via cfe-commits 
michaelrj added inline comments.



Comment at: clang-tools-extra/clang-tidy/llvmlibc/CalleeNamespaceCheck.cpp:39
+// intercepted.
+static const char *FUNCTIONS_TO_IGNORE_NAMESPACE[] = {
+"__errno_location", "malloc", "calloc", "realloc", "free"};

sivachandra wrote:
> michaelrj wrote:
> > sivachandra wrote:
> > > Eugene.Zelenko wrote:
> > > > Why not `std::array` of appropriate LLVM container?
> > > May be `static const std::uordered_set`? It would likely 
> > > make the lookup below much neater.
> > an unordered set is a good idea, but the documentation for `StringRef` says 
> > it's best not to use them for storage, so I went with `std::string` 
> > instead. The code is still a lot nicer.
> Literal strings will not count as "storage". They are global data. On the 
> other hand, `std::string` will make copies of the literals and require 
> "storage".
When I tried to put a `StringRef` into an `unordered_set` it told me that 
`StringRef` doesn't have a hash function, so I went looking for what the 
proper, LLVM way of doing this was. In the end, I discovered that 
`unordered_set` is not recommended, and that `StringSet` does exactly what we 
need here, so I've switched to that.


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[PATCH] D113946: [libc][clang-tidy] fix namespace check for externals

2021-11-16 Thread Michael Jones via Phabricator via cfe-commits 
michaelrj updated this revision to Diff 387759.
michaelrj marked an inline comment as done.
michaelrj added a comment.

update the set type


Repository:
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Files:
  clang-tools-extra/clang-tidy/llvmlibc/CalleeNamespaceCheck.cpp
  clang-tools-extra/test/clang-tidy/checkers/llvmlibc-callee-namespace.cpp
  libc/docs/clang_tidy_checks.rst
  libc/src/__support/FPUtil/NearestIntegerOperations.h
  libc/src/__support/str_to_float.h
  libc/src/__support/str_to_integer.h
  libc/src/math/generic/math_utils.h
  libc/src/string/strdup.cpp
  libc/src/string/strndup.cpp

Index: libc/src/string/strndup.cpp
===
--- libc/src/string/strndup.cpp
+++ libc/src/string/strndup.cpp
@@ -23,7 +23,7 @@
   size_t len = internal::string_length(src);
   if (len > size)
 len = size;
-  char *dest = reinterpret_cast(::malloc(len + 1)); // NOLINT
+  char *dest = reinterpret_cast(::malloc(len + 1));
   if (dest == nullptr)
 return nullptr;
   char *result =
Index: libc/src/string/strdup.cpp
===
--- libc/src/string/strdup.cpp
+++ libc/src/string/strdup.cpp
@@ -21,7 +21,7 @@
 return nullptr;
   }
   size_t len = internal::string_length(src) + 1;
-  char *dest = reinterpret_cast(::malloc(len)); // NOLINT
+  char *dest = reinterpret_cast(::malloc(len));
   if (dest == nullptr) {
 return nullptr;
   }
Index: libc/src/math/generic/math_utils.h
===
--- libc/src/math/generic/math_utils.h
+++ libc/src/math/generic/math_utils.h
@@ -55,7 +55,7 @@
 
 template  static inline T with_errno(T x, int err) {
   if (math_errhandling & MATH_ERRNO)
-errno = err; // NOLINT
+errno = err;
   return x;
 }
 
Index: libc/src/__support/str_to_integer.h
===
--- libc/src/__support/str_to_integer.h
+++ libc/src/__support/str_to_integer.h
@@ -74,7 +74,7 @@
   const char *original_src = src;
 
   if (base < 0 || base == 1 || base > 36) {
-errno = EINVAL; // NOLINT
+errno = EINVAL;
 return 0;
   }
 
@@ -114,19 +114,19 @@
 // the result cannot change, but we still need to advance src to the end of
 // the number.
 if (result == ABS_MAX) {
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
   continue;
 }
 
 if (result > ABS_MAX_DIV_BY_BASE) {
   result = ABS_MAX;
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
 } else {
   result = result * base;
 }
 if (result > ABS_MAX - cur_digit) {
   result = ABS_MAX;
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
 } else {
   result = result + cur_digit;
 }
Index: libc/src/__support/str_to_float.h
===
--- libc/src/__support/str_to_float.h
+++ libc/src/__support/str_to_float.h
@@ -220,7 +220,7 @@
   static_cast(fputil::FloatProperties::exponentBias)) {
 *outputMantissa = 0;
 *outputExp2 = fputil::FPBits::maxExponent;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
   // If the exponent is too small even for a subnormal, return 0.
@@ -230,7 +230,7 @@
fputil::FloatProperties::mantissaWidth)) {
 *outputMantissa = 0;
 *outputExp2 = 0;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
 
@@ -273,7 +273,7 @@
   if (exp2 >= fputil::FPBits::maxExponent) {
 *outputMantissa = 0;
 *outputExp2 = fputil::FPBits::maxExponent;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
 
@@ -309,7 +309,7 @@
   }
 
   if (exp2 == 0) {
-errno = ERANGE; // NOLINT
+errno = ERANGE;
   }
 
   *outputMantissa = finalMantissa;
@@ -411,7 +411,7 @@
   static_cast(fputil::FloatProperties::exponentBias) / 3) {
 *outputMantissa = 0;
 *outputExp2 = fputil::FPBits::maxExponent;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
   // If the exponent is too small even for a subnormal, return 0.
@@ -422,7 +422,7 @@
   2) {
 *outputMantissa = 0;
 *outputExp2 = 0;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
 
@@ -508,7 +508,7 @@
 // If we cut off any bits to fit this number into a subnormal, then it's
 // out of range for this size of float.
 if ((mantissa & ((1 << amountToShift) - 1)) > 0) {
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
 }
 mantissa = shiftRightAndRound(mantissa, amountToShift);
 if (mantissa == OVERFLOWED_MANTISSA) {
@@ -524,7 +524,7 @@
 // This indicates an overflow, so we make the result INF and set errno.
 biasedExponent = (1 << fputil::FloatProperties::exponentWidth) - 1;
 mantissa = 0;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
   }

[PATCH] D113946: [libc][clang-tidy] fix namespace check for externals

2021-11-16 Thread Siva Chandra via Phabricator via cfe-commits 
sivachandra accepted this revision.
sivachandra added a comment.

For libc requirements, LGTM. Please wait for @aaron.ballman for stamping the 
clang-tidy parts.




Comment at: clang-tools-extra/clang-tidy/llvmlibc/CalleeNamespaceCheck.cpp:39
+// intercepted.
+static const char *FUNCTIONS_TO_IGNORE_NAMESPACE[] = {
+"__errno_location", "malloc", "calloc", "realloc", "free"};

michaelrj wrote:
> sivachandra wrote:
> > Eugene.Zelenko wrote:
> > > Why not `std::array` of appropriate LLVM container?
> > May be `static const std::uordered_set`? It would likely 
> > make the lookup below much neater.
> an unordered set is a good idea, but the documentation for `StringRef` says 
> it's best not to use them for storage, so I went with `std::string` instead. 
> The code is still a lot nicer.
Literal strings will not count as "storage". They are global data. On the other 
hand, `std::string` will make copies of the literals and require "storage".


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[PATCH] D113946: [libc][clang-tidy] fix namespace check for externals

2021-11-16 Thread Michael Jones via Phabricator via cfe-commits 
michaelrj updated this revision to Diff 387713.
michaelrj added a comment.

add test for the new lint behavior:


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Files:
  clang-tools-extra/clang-tidy/llvmlibc/CalleeNamespaceCheck.cpp
  clang-tools-extra/test/clang-tidy/checkers/llvmlibc-callee-namespace.cpp
  libc/docs/clang_tidy_checks.rst
  libc/src/__support/FPUtil/NearestIntegerOperations.h
  libc/src/__support/str_to_float.h
  libc/src/__support/str_to_integer.h
  libc/src/math/generic/math_utils.h
  libc/src/string/strdup.cpp
  libc/src/string/strndup.cpp

Index: libc/src/string/strndup.cpp
===
--- libc/src/string/strndup.cpp
+++ libc/src/string/strndup.cpp
@@ -23,7 +23,7 @@
   size_t len = internal::string_length(src);
   if (len > size)
 len = size;
-  char *dest = reinterpret_cast(::malloc(len + 1)); // NOLINT
+  char *dest = reinterpret_cast(::malloc(len + 1));
   if (dest == nullptr)
 return nullptr;
   char *result =
Index: libc/src/string/strdup.cpp
===
--- libc/src/string/strdup.cpp
+++ libc/src/string/strdup.cpp
@@ -21,7 +21,7 @@
 return nullptr;
   }
   size_t len = internal::string_length(src) + 1;
-  char *dest = reinterpret_cast(::malloc(len)); // NOLINT
+  char *dest = reinterpret_cast(::malloc(len));
   if (dest == nullptr) {
 return nullptr;
   }
Index: libc/src/math/generic/math_utils.h
===
--- libc/src/math/generic/math_utils.h
+++ libc/src/math/generic/math_utils.h
@@ -55,7 +55,7 @@
 
 template  static inline T with_errno(T x, int err) {
   if (math_errhandling & MATH_ERRNO)
-errno = err; // NOLINT
+errno = err;
   return x;
 }
 
Index: libc/src/__support/str_to_integer.h
===
--- libc/src/__support/str_to_integer.h
+++ libc/src/__support/str_to_integer.h
@@ -74,7 +74,7 @@
   const char *original_src = src;
 
   if (base < 0 || base == 1 || base > 36) {
-errno = EINVAL; // NOLINT
+errno = EINVAL;
 return 0;
   }
 
@@ -114,19 +114,19 @@
 // the result cannot change, but we still need to advance src to the end of
 // the number.
 if (result == ABS_MAX) {
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
   continue;
 }
 
 if (result > ABS_MAX_DIV_BY_BASE) {
   result = ABS_MAX;
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
 } else {
   result = result * base;
 }
 if (result > ABS_MAX - cur_digit) {
   result = ABS_MAX;
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
 } else {
   result = result + cur_digit;
 }
Index: libc/src/__support/str_to_float.h
===
--- libc/src/__support/str_to_float.h
+++ libc/src/__support/str_to_float.h
@@ -220,7 +220,7 @@
   static_cast(fputil::FloatProperties::exponentBias)) {
 *outputMantissa = 0;
 *outputExp2 = fputil::FPBits::maxExponent;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
   // If the exponent is too small even for a subnormal, return 0.
@@ -230,7 +230,7 @@
fputil::FloatProperties::mantissaWidth)) {
 *outputMantissa = 0;
 *outputExp2 = 0;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
 
@@ -273,7 +273,7 @@
   if (exp2 >= fputil::FPBits::maxExponent) {
 *outputMantissa = 0;
 *outputExp2 = fputil::FPBits::maxExponent;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
 
@@ -309,7 +309,7 @@
   }
 
   if (exp2 == 0) {
-errno = ERANGE; // NOLINT
+errno = ERANGE;
   }
 
   *outputMantissa = finalMantissa;
@@ -411,7 +411,7 @@
   static_cast(fputil::FloatProperties::exponentBias) / 3) {
 *outputMantissa = 0;
 *outputExp2 = fputil::FPBits::maxExponent;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
   // If the exponent is too small even for a subnormal, return 0.
@@ -422,7 +422,7 @@
   2) {
 *outputMantissa = 0;
 *outputExp2 = 0;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
 
@@ -508,7 +508,7 @@
 // If we cut off any bits to fit this number into a subnormal, then it's
 // out of range for this size of float.
 if ((mantissa & ((1 << amountToShift) - 1)) > 0) {
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
 }
 mantissa = shiftRightAndRound(mantissa, amountToShift);
 if (mantissa == OVERFLOWED_MANTISSA) {
@@ -524,7 +524,7 @@
 // This indicates an overflow, so we make the result INF and set errno.
 biasedExponent = (1 << fputil::FloatProperties::exponentWidth) - 1;
 mantissa = 0;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
   }
   *outputMantissa = mantissa;

[PATCH] D113946: [libc][clang-tidy] fix namespace check for externals

2021-11-16 Thread Michael Jones via Phabricator via cfe-commits 
michaelrj added inline comments.



Comment at: clang-tools-extra/clang-tidy/llvmlibc/CalleeNamespaceCheck.cpp:13
 
+#include 
+

sivachandra wrote:
> Eugene.Zelenko wrote:
> > Should  be `` and without newline separation form rest of headers.
> Looks like this is present only for the debug `printf`?
yes, I didn't mean to leave that in there.



Comment at: clang-tools-extra/clang-tidy/llvmlibc/CalleeNamespaceCheck.cpp:39
+// intercepted.
+static const char *FUNCTIONS_TO_IGNORE_NAMESPACE[] = {
+"__errno_location", "malloc", "calloc", "realloc", "free"};

sivachandra wrote:
> Eugene.Zelenko wrote:
> > Why not `std::array` of appropriate LLVM container?
> May be `static const std::uordered_set`? It would likely 
> make the lookup below much neater.
an unordered set is a good idea, but the documentation for `StringRef` says 
it's best not to use them for storage, so I went with `std::string` instead. 
The code is still a lot nicer.



Comment at: clang-tools-extra/clang-tidy/llvmlibc/CalleeNamespaceCheck.cpp:59
+llvm::StringRef(FUNCTIONS_TO_IGNORE_NAMESPACE[i]))) {
+  printf("String found %s\n", FuncDecl->getName().str().c_str());
+  return;

sivachandra wrote:
> lntue wrote:
> > Look like diag() is used to print messages in this module?
> This looks like a debug `printf`?
yes, I didn't mean to leave that in there.


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[PATCH] D113946: [libc][clang-tidy] fix namespace check for externals

2021-11-16 Thread Michael Jones via Phabricator via cfe-commits 
michaelrj updated this revision to Diff 387703.
michaelrj marked 6 inline comments as done.
michaelrj added a comment.

clean up the code and remove debug statements


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Files:
  clang-tools-extra/clang-tidy/llvmlibc/CalleeNamespaceCheck.cpp
  libc/docs/clang_tidy_checks.rst
  libc/src/__support/FPUtil/NearestIntegerOperations.h
  libc/src/__support/str_to_float.h
  libc/src/__support/str_to_integer.h
  libc/src/math/generic/math_utils.h
  libc/src/string/strdup.cpp
  libc/src/string/strndup.cpp

Index: libc/src/string/strndup.cpp
===
--- libc/src/string/strndup.cpp
+++ libc/src/string/strndup.cpp
@@ -23,7 +23,7 @@
   size_t len = internal::string_length(src);
   if (len > size)
 len = size;
-  char *dest = reinterpret_cast(::malloc(len + 1)); // NOLINT
+  char *dest = reinterpret_cast(::malloc(len + 1));
   if (dest == nullptr)
 return nullptr;
   char *result =
Index: libc/src/string/strdup.cpp
===
--- libc/src/string/strdup.cpp
+++ libc/src/string/strdup.cpp
@@ -21,7 +21,7 @@
 return nullptr;
   }
   size_t len = internal::string_length(src) + 1;
-  char *dest = reinterpret_cast(::malloc(len)); // NOLINT
+  char *dest = reinterpret_cast(::malloc(len));
   if (dest == nullptr) {
 return nullptr;
   }
Index: libc/src/math/generic/math_utils.h
===
--- libc/src/math/generic/math_utils.h
+++ libc/src/math/generic/math_utils.h
@@ -55,7 +55,7 @@
 
 template  static inline T with_errno(T x, int err) {
   if (math_errhandling & MATH_ERRNO)
-errno = err; // NOLINT
+errno = err;
   return x;
 }
 
Index: libc/src/__support/str_to_integer.h
===
--- libc/src/__support/str_to_integer.h
+++ libc/src/__support/str_to_integer.h
@@ -74,7 +74,7 @@
   const char *original_src = src;
 
   if (base < 0 || base == 1 || base > 36) {
-errno = EINVAL; // NOLINT
+errno = EINVAL;
 return 0;
   }
 
@@ -114,19 +114,19 @@
 // the result cannot change, but we still need to advance src to the end of
 // the number.
 if (result == ABS_MAX) {
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
   continue;
 }
 
 if (result > ABS_MAX_DIV_BY_BASE) {
   result = ABS_MAX;
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
 } else {
   result = result * base;
 }
 if (result > ABS_MAX - cur_digit) {
   result = ABS_MAX;
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
 } else {
   result = result + cur_digit;
 }
Index: libc/src/__support/str_to_float.h
===
--- libc/src/__support/str_to_float.h
+++ libc/src/__support/str_to_float.h
@@ -220,7 +220,7 @@
   static_cast(fputil::FloatProperties::exponentBias)) {
 *outputMantissa = 0;
 *outputExp2 = fputil::FPBits::maxExponent;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
   // If the exponent is too small even for a subnormal, return 0.
@@ -230,7 +230,7 @@
fputil::FloatProperties::mantissaWidth)) {
 *outputMantissa = 0;
 *outputExp2 = 0;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
 
@@ -273,7 +273,7 @@
   if (exp2 >= fputil::FPBits::maxExponent) {
 *outputMantissa = 0;
 *outputExp2 = fputil::FPBits::maxExponent;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
 
@@ -309,7 +309,7 @@
   }
 
   if (exp2 == 0) {
-errno = ERANGE; // NOLINT
+errno = ERANGE;
   }
 
   *outputMantissa = finalMantissa;
@@ -411,7 +411,7 @@
   static_cast(fputil::FloatProperties::exponentBias) / 3) {
 *outputMantissa = 0;
 *outputExp2 = fputil::FPBits::maxExponent;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
   // If the exponent is too small even for a subnormal, return 0.
@@ -422,7 +422,7 @@
   2) {
 *outputMantissa = 0;
 *outputExp2 = 0;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
 
@@ -508,7 +508,7 @@
 // If we cut off any bits to fit this number into a subnormal, then it's
 // out of range for this size of float.
 if ((mantissa & ((1 << amountToShift) - 1)) > 0) {
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
 }
 mantissa = shiftRightAndRound(mantissa, amountToShift);
 if (mantissa == OVERFLOWED_MANTISSA) {
@@ -524,7 +524,7 @@
 // This indicates an overflow, so we make the result INF and set errno.
 biasedExponent = (1 << fputil::FloatProperties::exponentWidth) - 1;
 mantissa = 0;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
   }
   *outputMantissa = mantissa;
   *outputExp2 =

[PATCH] D113946: [libc][clang-tidy] fix namespace check for externals

2021-11-15 Thread Siva Chandra via Phabricator via cfe-commits 
sivachandra added inline comments.



Comment at: clang-tools-extra/clang-tidy/llvmlibc/CalleeNamespaceCheck.cpp:1
 //===-- CalleeNamespaceCheck.cpp 
--===//
 //

You should add tests for this exception check. See 
https://github.com/llvm/llvm-project/blob/main/clang-tools-extra/test/clang-tidy/checkers/llvmlibc-callee-namespace.cpp.



Comment at: clang-tools-extra/clang-tidy/llvmlibc/CalleeNamespaceCheck.cpp:13
 
+#include 
+

Eugene.Zelenko wrote:
> Should  be `` and without newline separation form rest of headers.
Looks like this is present only for the debug `printf`?



Comment at: clang-tools-extra/clang-tidy/llvmlibc/CalleeNamespaceCheck.cpp:39
+// intercepted.
+static const char *FUNCTIONS_TO_IGNORE_NAMESPACE[] = {
+"__errno_location", "malloc", "calloc", "realloc", "free"};

Eugene.Zelenko wrote:
> Why not `std::array` of appropriate LLVM container?
May be `static const std::uordered_set`? It would likely make 
the lookup below much neater.



Comment at: clang-tools-extra/clang-tidy/llvmlibc/CalleeNamespaceCheck.cpp:59
+llvm::StringRef(FUNCTIONS_TO_IGNORE_NAMESPACE[i]))) {
+  printf("String found %s\n", FuncDecl->getName().str().c_str());
+  return;

lntue wrote:
> Look like diag() is used to print messages in this module?
This looks like a debug `printf`?


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[PATCH] D113946: [libc][clang-tidy] fix namespace check for externals

2021-11-15 Thread Eugene Zelenko via Phabricator via cfe-commits 
Eugene.Zelenko added inline comments.



Comment at: clang-tools-extra/clang-tidy/llvmlibc/CalleeNamespaceCheck.cpp:13
 
+#include 
+

Should  be `` and without newline separation form rest of headers.



Comment at: clang-tools-extra/clang-tidy/llvmlibc/CalleeNamespaceCheck.cpp:39
+// intercepted.
+static const char *FUNCTIONS_TO_IGNORE_NAMESPACE[] = {
+"__errno_location", "malloc", "calloc", "realloc", "free"};

Why not `std::array` of appropriate LLVM container?


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[PATCH] D113946: [libc][clang-tidy] fix namespace check for externals

2021-11-15 Thread Tue Ly via Phabricator via cfe-commits 
lntue added inline comments.



Comment at: clang-tools-extra/clang-tidy/llvmlibc/CalleeNamespaceCheck.cpp:59
+llvm::StringRef(FUNCTIONS_TO_IGNORE_NAMESPACE[i]))) {
+  printf("String found %s\n", FuncDecl->getName().str().c_str());
+  return;

Look like diag() is used to print messages in this module?


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[PATCH] D113946: [libc][clang-tidy] fix namespace check for externals

2021-11-15 Thread Michael Jones via Phabricator via cfe-commits 
michaelrj created this revision.
michaelrj added reviewers: sivachandra, lntue.
Herald added subscribers: libc-commits, carlosgalvezp, ecnelises, tschuett, 
xazax.hun.
Herald added a project: libc-project.
michaelrj requested review of this revision.
Herald added a project: clang-tools-extra.
Herald added a subscriber: cfe-commits.

Up until now, all references to `errno` were marked with `NOLINT`, since
it was technically calling an external function. This fixes the lint
rules so that `errno`, as well as `malloc`, `calloc`, `realloc`, and
`free` are all allowed to be called as external functions. All of the
relevant `NOLINT` comments have been removed, and the documentation has
been updated.


Repository:
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Files:
  clang-tools-extra/clang-tidy/llvmlibc/CalleeNamespaceCheck.cpp
  libc/docs/clang_tidy_checks.rst
  libc/src/__support/FPUtil/NearestIntegerOperations.h
  libc/src/__support/str_to_float.h
  libc/src/__support/str_to_integer.h
  libc/src/math/generic/math_utils.h
  libc/src/string/strdup.cpp
  libc/src/string/strndup.cpp

Index: libc/src/string/strndup.cpp
===
--- libc/src/string/strndup.cpp
+++ libc/src/string/strndup.cpp
@@ -23,7 +23,7 @@
   size_t len = internal::string_length(src);
   if (len > size)
 len = size;
-  char *dest = reinterpret_cast(::malloc(len + 1)); // NOLINT
+  char *dest = reinterpret_cast(::malloc(len + 1));
   if (dest == nullptr)
 return nullptr;
   char *result =
Index: libc/src/string/strdup.cpp
===
--- libc/src/string/strdup.cpp
+++ libc/src/string/strdup.cpp
@@ -21,7 +21,7 @@
 return nullptr;
   }
   size_t len = internal::string_length(src) + 1;
-  char *dest = reinterpret_cast(::malloc(len)); // NOLINT
+  char *dest = reinterpret_cast(::malloc(len));
   if (dest == nullptr) {
 return nullptr;
   }
Index: libc/src/math/generic/math_utils.h
===
--- libc/src/math/generic/math_utils.h
+++ libc/src/math/generic/math_utils.h
@@ -55,7 +55,7 @@
 
 template  static inline T with_errno(T x, int err) {
   if (math_errhandling & MATH_ERRNO)
-errno = err; // NOLINT
+errno = err;
   return x;
 }
 
Index: libc/src/__support/str_to_integer.h
===
--- libc/src/__support/str_to_integer.h
+++ libc/src/__support/str_to_integer.h
@@ -74,7 +74,7 @@
   const char *original_src = src;
 
   if (base < 0 || base == 1 || base > 36) {
-errno = EINVAL; // NOLINT
+errno = EINVAL;
 return 0;
   }
 
@@ -114,19 +114,19 @@
 // the result cannot change, but we still need to advance src to the end of
 // the number.
 if (result == ABS_MAX) {
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
   continue;
 }
 
 if (result > ABS_MAX_DIV_BY_BASE) {
   result = ABS_MAX;
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
 } else {
   result = result * base;
 }
 if (result > ABS_MAX - cur_digit) {
   result = ABS_MAX;
-  errno = ERANGE; // NOLINT
+  errno = ERANGE;
 } else {
   result = result + cur_digit;
 }
Index: libc/src/__support/str_to_float.h
===
--- libc/src/__support/str_to_float.h
+++ libc/src/__support/str_to_float.h
@@ -220,7 +220,7 @@
   static_cast(fputil::FloatProperties::exponentBias)) {
 *outputMantissa = 0;
 *outputExp2 = fputil::FPBits::maxExponent;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
   // If the exponent is too small even for a subnormal, return 0.
@@ -230,7 +230,7 @@
fputil::FloatProperties::mantissaWidth)) {
 *outputMantissa = 0;
 *outputExp2 = 0;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
 
@@ -273,7 +273,7 @@
   if (exp2 >= fputil::FPBits::maxExponent) {
 *outputMantissa = 0;
 *outputExp2 = fputil::FPBits::maxExponent;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
 
@@ -309,7 +309,7 @@
   }
 
   if (exp2 == 0) {
-errno = ERANGE; // NOLINT
+errno = ERANGE;
   }
 
   *outputMantissa = finalMantissa;
@@ -411,7 +411,7 @@
   static_cast(fputil::FloatProperties::exponentBias) / 3) {
 *outputMantissa = 0;
 *outputExp2 = fputil::FPBits::maxExponent;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
   // If the exponent is too small even for a subnormal, return 0.
@@ -422,7 +422,7 @@
   2) {
 *outputMantissa = 0;
 *outputExp2 = 0;
-errno = ERANGE; // NOLINT
+errno = ERANGE;
 return;
   }
 
@@ -508,7 +508,7 @@
 // If we cut off any bits to fit this number into a subnormal, then it's
 // out of range for this size of float.
 if ((mantissa & ((1 << amountToShift) - 1)) > 0) {
-